Spring-operated shade roller



Nov. 25, 1930. w. o. N. SGDERQVIST 1,782,976

SPRING OPERATED SHADE ROLLER Filed OCt. 29, 1929 I ,,,,1l// I N PatentedNov. 25, 1930 UN TED-mm j WILLIAMbSKAR NiconAUs sonnnovisrgortinizoriiieswnnnn srni ve-ornimmnn SHADE ROLLER Application filedOctober'QS,1929,Se1'ia1 No. 403,230, and in Sweden November fi, 192s.

This invention refers 'to shade rollers of e the class where theautomatic winding of'the roller is :efiected by a coil spring and thede? sired stop positionsfregulated by dogs which i cooperate withnotches in a stationary member; i x The object of my invention istoprovide an automatically operated shade roller of the I class mentionedin which the springmoto-rwith its fittings are of a very slmpledesignwhich facilitates the construction ,as well as the maintenance of theroller and especially theassembling of the different parts. e

The most characteristic feature-.ofthis invention, and which renders thedevice easy to manufacture, is that I have omitted the shaft or rodwhichin the various types of hitherto known shade rollers of this. classconstitutes .themotorshaft. In myjmproved roller the springmotor-operates without such a shaft and transmits its driving forcedirectlyfrom the parts which keep theone end of the spring .stationaryonto the roller proper.

In the accompanying drawing twoembodimentsof the invention arelshown,'which differso mewhat in the devices for-attaching the sprinsg to thestationary member. a 1 In the drawing 4 a u Fig. 1 is a'diagrammaticalView partially lIilSBCtlOll of theentire roller suspended in a windowcasing showing the positionof the i spring motor Within the rolleributnot the de tails of said motorstno-r of the stopping devices. i I} rFig. 2 is a longitudinal section of the motor endof the roller. i

"Fig.3 is a planview of cap closing the motor end of the roller-andlooked from inside. IFigaP-is a longitudinal view partlally 1nsection'of an embodimentofthe fixture of the stationary spring end.

w Fig. 5. is anf endview ofthe part shown in" 1 embodimentnof theinvention.

I of the deviceiniEig. e

embodiment; in Fig. 2, and

axially projecting central pin5which is 1-0 saidtbracket such usuallyknown in this class of-shade rollers. Theopposite end of the roller 2provided with an aziial boring 6 intowhich a coil spring. 7' ishoused.The boring 6 is closed at the end bya cap 8 fase t Fig. Sisalongitudinalsection ofadetailg Fig; 9 is an end vielw of the partshownin Fig, I 8 locked from the right :hand of said figure. a Q

ig. 10 is a similar viewfas in Figf L' of a part having the same'functionfin the embodi' 5 ment in 1g. Tasthe aforesaidpart in the Fig.'1l is an end; view of the coil-spring showing how this'spring attachedto the part showninlFigglO. 7 f [11 I In the drawing 1 designates thewindow casing and=:2 the shade rollerwhich'is suspended in the casing 1by means of brackets I 3 and The one end of the roller (the left handend in Fig. 1) is provided with an tat-able in a corresponding bore inthe bracket to allow. the free revolving of the roller in tened to theroller 2 in any convenient my for instance by squeeiing the sharped edge9' 5 of the collar of the cap into the Wooden roller 1. Thecap' 8 has a:central aperture. which is clearly visible in Fig.7 at 10 "but cannot beseen 1n F ig..2 owing to its narrow fitting aroundthe part embracedwithin said pertt e...- a I will oyydescribe the embodiment shown in Fgs. 2%5inclusive. Behind the cap 8 9 spaced therefrom by anarrowinterspace is i an annular (115C 11 which attachedto cap 8 by. meansoftwo diametricallyopposed rivets 12. Said rivets serve also each as apivotfor a dog lli; which dogscooperate with notcheslt in a centralmember 15 r e 1 The central member 15 can be described as i c mp d f WOoaxi l e ow Portions, the one 1631f which has asubstantially cylin- V jl h L I drical shapeandthe other 17 abevelled shape. x i Fig. :6 isaniclevation view of asuspension bracket for the roller; .y g

Fig. 7 islin section a portion ofthe same rolleraend as in Fig. 2 but;showinganother The cylindrical portion -16 has its shell cut tions ofsaid slots constituting the aforesaid notches 14. Thepieces of the shellleft between said 1 slots l8 have the shape of two diametricallyopposedand axially projecting tongues or lugs 19 as can be clearly seen in Fig.2. The connection between the cylindrical portion 16 and the bevelledportion 17' forms a step or collar 20 which rests against the outside ofthe annular disc 11 whereby the flared end portion of bevel 17 serves asa stopper which prevents the member 15 to be drawn out to the rightthrough the bore in the annular disc 11 while the collar 20 prevents asimilar drawing out to the left causing a rigid attachment betweenmember 15 and disc 11. Vhen assembling these parts the portion 17 ofmember 15 from origin is cylindrical so that it can be passed throughthe boring in disc 11, and the left hand end of the portion 17 getsflared out afterwards.

The inner end of coil spring 7 is formed with a hook shapedbend 21, anda spike 22 is drawn in transversely through the roller 2 sothat itpasses through said hooked coil spring end 21, thereby anchoring thecoil spring within the bore 6 of roller 2 whilst the outer end of thecoil spring is somewhat reduced in width and wound around the bevelledportion 17 of member 15 before the flaring out of said portion has beencarried out. The out flaring of portion 17 which can be effected forinstance by means of a suitable tool inserted from outside into theboring of member 15 affords the fastening of spring 7 to member 15 aswell as the aforesaid assembling of member 15 and disc 11.

The disc 11 serves also as a bearing for member 15 which can be revolvedwithin said disc like a journal in its bearing. The bracket 3 at themotor end of roller 2 is provided with two vertically disposed slots 23ending each into an enlargement 24, and through these slots the tongues19 of member 15 are slid down so asto be housed each in its enlargement24, when the roller becomes suspended in the window casing 1.The-cooperation between the two slots 23 with their enlargements 24 andthe tongues 19 prevents the revolving of member 15, and as a consequencethe coil spring 7 will be twisted and compressed, if the roller 2 getsrevolved, whereby the pin 5 in the left hand bracket 4 and the annulardisc 11 around the member 15 serve as journals and bearings. lVhen fastrevolving the dogs 13 are slung out by the centrifugal force, but whenstopping the rotation the one dog or the other as the case may be dropsdown, and its free end enters the nearest notch 14 thus locking theroller in the desired position as is very well known in shade rollers ofthe same class;

The other embodiment shown in Figs. 7 to 11 inclusive will now bedescribed. 3 The disparities are found in the method of assembling thecoil spring 7 and stationary member 150, and the design of lastmentionedmember. 1 V

The boring 6 in the roller 1 also in this embodiment of the inventionisclosed at the end by a cap 8 attached to the roller in the same way asin the aforesaid embodiment. Instead of the annular disc 11 there is asubstantially cup shaped member shown in detail in Figs. 8 and 9, whichmember consists in two cylindric portions the one 110 of substantiallythe same outer diameter as the inner diameter of cap 8, and the otherportioullO of substantially the same outer diameter as the innerdiameter of boring 6. The bottom 201 of portion 110 forms a step orcollar provided to cooperate with the rear surface 200 of a step of astepped cylindrical member 150, clearly shown'in Fig. 10, and whichmember substantially corresponds to the central member 15 of thepreparatory described embodiment. The neck 170 of stepped member 150 isprovided with a longitudinalslot 171 into which the radially inwardsbent end 210 of coil spring 7 is inserted so as to twist the spring, theinner end of which is anchored to roller 2 in substantially the same wayas shown in Fig. 2) when the roller 2 is revolved around the stationarymember 150.

Member 150 is kept stationary by means of tongues 190 projectinglongitudinally from the larger cylindrical portion 160, which tongues190 when the roller is in operative position in window casing 1 rest inthe respective slots 23 with enlargements 24- in the right hand bracket3, as shown in Fig. 6.

The cup shaped member 110 hastwo diametrically opposed rivets whichserve as pivots for dogs 130, which cooperate with notches in membersimilar to the dogs 13 and notches 14 in the aforesaid embodiment. Aring 25 embraces the end of coil spring 7 upon the neck of member 150and bears with its one edge against the bottom 201 of member 110 thusassembling members 110 and 150 in a rotatable manner.

Having thus described my invention and how it is to be performed, what Iclaim as new and want to protect by Letters Patent is:

1. A shade roller'having a bore in one end, a coil spring in the borehaving its inner end fixed to the roller, a cap closing the end of thebore, said cap having an aperture therein,

a member rotatably engaged in said aperture and fixed to the outer endof the spring, said member having a step intermediate its ends, andmeans within the cap engaging the step to prevent axial movement thereofwhen the spring is under compression, as and for the purpose set forth.

2. A shade roller having a bore in one end, a coil spring in the bore,means for fixing the inner end of the spring to the roller, a capclosing the end of the bore and having an aperture therein, a sleeverotatably engagedin the aperture and fixed to the outer end of thespring, said sleeve having spaced tongues upon its outer end and notchesadjacent the tongues, dogs pivotally carried by the cap and Ill!engageable in the notches to retain-the roller in adjusted position,said tongues being engageahle with a bracket to retain the sleeveagainst rotation during winding of the roller.

3. A shade roller having a bore in one end, a coil spring in the bore,means for securing the inner end of the spring to the roller, a

cap closing the end of the bore and having an aperture therein, asleevefixed to the outer end of the spring, said sleeve having a flaredportion and a portion provided with notches,

a step between the flared portion and the notched portion, dogspivotally mounted on the cap for engagement with the notches, a

disk confined within the cap and rotatahly engaged on the sleeve, thestep andflared portion serving to retain the sleeve against axialmovement during rotation of the'roller. In testimony whereof Ihave'aflixed my signature.

WILLIAM OSKAR NICOLAUS S6DERQVIST.

